Enjoy!
Gemstones of the World - Published 1997 by Sterling Publishing Co., Inc., Walter Schumann, author.
The Audubon Society Field Guide to North American Rocks & Minerals - Published 1978 by Alfred A. Knopf, Charles W. Chesterman, author.
Cunningham’s Encyclopedia of Crystal, Gem & Metal Magic - Published 1995 by Llewellyn Publications, Scott Cunningham, author.